What is this artifact?
- Larry 1969
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What is this artifact?
Good day all!
I think my last post on this topic contained too many questions so I've decided to focus on one at a time.
This image is comprised of three consecutive nights of data calibrated with flats, dark flats and bias frames.
There is clearly something wrong. This streak appears in all of my light frames...
I applied flat black paint to everything shiny in my tube (focuser screws and secondary holder attachments). I had a brief clearing so I took advantage.
This image is only 15 minutes of data and it was taken a few weeks later under a full moon. I moved the target center to see what would happen and the smear stayed in the same location as the galaxy... There doesn't appear to be any bright stars in that region so I'm at a bit of a loss.
I'm really not sure what to check next...
Any suggestions?
Thanks for looking!
Larry
I think my last post on this topic contained too many questions so I've decided to focus on one at a time.
This image is comprised of three consecutive nights of data calibrated with flats, dark flats and bias frames.
There is clearly something wrong. This streak appears in all of my light frames...
I applied flat black paint to everything shiny in my tube (focuser screws and secondary holder attachments). I had a brief clearing so I took advantage.
This image is only 15 minutes of data and it was taken a few weeks later under a full moon. I moved the target center to see what would happen and the smear stayed in the same location as the galaxy... There doesn't appear to be any bright stars in that region so I'm at a bit of a loss.
I'm really not sure what to check next...
Any suggestions?
Thanks for looking!
Larry
Last edited by Larry 1969 on Sat Nov 20, 2021 6:36 pm, edited 1 time in total.
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
- Gordon
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Re: What is this artifact?
The first image is probably a satellite passing.
The second image looks like very high wispy clouds passing.
The second image looks like very high wispy clouds passing.
Gordon
Scopes: Explore Scientific ED80CF, Skywatcher 200 Quattro Imaging Newt, SeeStar S50 for EAA.
Mounts: Orion Atlas EQ-g mount & Skywatcher EQ5 Pro.
ZWO mini guider.
Image cameras: ZWO ASI1600 MM Cool, ZWO ASI533mc-Pro, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC
Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm
Eyepieces: a few.
Primary software: Cartes du Ciel, N.I.N.A, StarTools V1.4.
Scopes: Explore Scientific ED80CF, Skywatcher 200 Quattro Imaging Newt, SeeStar S50 for EAA.
Mounts: Orion Atlas EQ-g mount & Skywatcher EQ5 Pro.
ZWO mini guider.
Image cameras: ZWO ASI1600 MM Cool, ZWO ASI533mc-Pro, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC
Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm
Eyepieces: a few.
Primary software: Cartes du Ciel, N.I.N.A, StarTools V1.4.
- Larry 1969
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Re: What is this artifact?
Thanks Gordon, but that streak in the first image is in every one of my subs and, if you look closely, it is in the second image as well but it's orientation with the galaxy is the same. Almost like there is a super bright star just outside my image circle, but there isn't...
Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
- STEVE333
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Re: What is this artifact?
Hi Larry - Two thoughts:
1) Have you checked with Orion Service Dept.?
2) Have you checked to make sure the diagonal mirror is clean.
I'm just grasping at straws here. I know you probably already checked the diagonal mirror.
Steve
1) Have you checked with Orion Service Dept.?
2) Have you checked to make sure the diagonal mirror is clean.
I'm just grasping at straws here. I know you probably already checked the diagonal mirror.
Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
- Larry 1969
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Re: What is this artifact?
Thanks Steve! Actually, I have not looked at the secondary mirror nor have I contacted Orion.
The second image is really poor but it was all I could do in 20 minutes of semi-clear sky. If you look closely you can see the streak.
I'll mark it so it stands out better.
Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
- Larry 1969
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Re: What is this artifact?
There.
I marked it in the original image.
Thanks for looking!
Larry
I marked it in the original image.
Thanks for looking!
Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
- dcrowson
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Re: What is this artifact?
Is this NGC 891? If so, that streak appears to be in the direction of Almach. Before doing anything more drastic, point somewhere else and see if it goes away.
Dan
Dan
- Larry 1969
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Re: What is this artifact?
Thanks Dan! It is indeed
Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
- Larry 1969
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Re: What is this artifact?
I just opened Stellarium and checked out my FOV . Almach is pretty far outside my FOV so I wouldn't think it would influence the image, but the angle seems to point to it. Here's a Stellarium screenshot that shows my FOV and Almach. The camera rotation is wrong but, if you draw a line from the edge of the galaxy to Almach, it looks like my image...
Larry
Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
- STEVE333
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Re: What is this artifact?
Is it possible the Explore Scientific Coma Corrector is causing the problem? Is it being used for these pictures?
Trying to image without theComa Corrector would answer the question. However, that may be a lot of work.
Steve
Trying to image without the
Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website: www.steveking.pictures
- Larry 1969
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Re: What is this artifact?
I am using the
It really seems like there is something in this part of the sky causing the issue but what? Others have imaged this galaxy without issue.
Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.
For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with an OTA mounted mini PC
Tele Vue Paracorr Type 2 coma corrector
Altair Hypercam 26C
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